package object;

public class ObjectDemo {
    public static void main(String[] args) {
        Point p = new Point(100,200);
        System.out.println(p);
        System.out.println(p.toString());
        //java中在任何类型与字符串的连接结果都是字符串
        //实际上JVM也是调用该类的toString()方法将其转为字符串
        String str = "这是一个点"+p;
        System.out.println(str);

        Point p1 = new Point(100,200);
        Object p2 = new Point(100,200);
        System.out.println(p1==p2);
        System.out.println(p1.equals(p2));
        System.out.println(p2.getClass());
        System.out.println(p1.getClass());

        String s1 = new String("hello");
        String s2 = new String("hello");
        System.out.println(s1.equals(s2));

        StringBuilder builder1 = new StringBuilder("hello");
        StringBuilder builder2 = new StringBuilder("hello");
        System.out.println(builder1.equals(builder2));

        System.out.println(s1.equals(builder1));
    }
}
